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Tick (mechanic)
A "tick" happens every 6 seconds (server side).
- It can refer to HP/Mana regeneration, DoT (damage over time) spells and effects, as well as things like when charm can possibly break.
See also: Meditate and HP Regeneration.
Advanced Tick Information
Every entity (player/npc) has their own tick timer associated with them. The timer on the server side will run regardless of what is occurring.
This means that if a buff lasts 3 ticks, it could really last anywhere from 12-18 seconds depending on the alignment of the tick timer and when the buff lands.
Certain effects like charm breaking appear to only be possible when a tick occurs on that entity. An entity's tick timer can be identified by applying a DOT since DOTs will only apply on ticks.
Ticks do not appear to be perfectly 6 seconds apart so when attempting to track a tick timer over time, your timer will need to be resync'ed often. Server lag can cause tick timers to become slightly out of sync.